Support structure for screening cylinders



Nov. 20, 1951 G. w. BORTON SUPPORT STRUCTURE FOR SCREENING CYLINDERS 3 Sheets-Sheet 1 Filed Sept. 9, 1949 INVENTOR. George W. Borton illillllllm ATTORNEY NOV. 20, 1951 5 w, BORTON 2,575,484

SUPPORT STRUCTURE FOR SCREENING CYLINDERS Filed Sept. 9, 1949 3 Sheets-Sheet 2 IN V EN TOR.

' George W. Borron BY ATTORNEY Nov. 20, 1951 G. w. BORTON' 2,575,484

SUPPORT STRUCTURE FOR SCREENING CYLINDERS Filed Sept. 9, 1949 5 Sheets-Sheet :5

' IIIIIIII III/III INVENTOR. George W. Borfon ATTORNEY Patented Nov. 20, 1951 SUPPORT STRUCTURE Foe SCREENING I CYLINDERS 7 George W. Burton, Philadelphia, Pa. Application September 9, 1949, Serial No. 114,766

This invention relates to crushing machinery and more particularly to crushing machinery of the Bradford mill type having a rotating cylindrical screen for discharging the crushed material.

An object of this invention is to provide'a rotatin crushing machine which is more easily constructed and less expensive to build.

Another object is to provide a crushing machine that is more eflicient to operate.

A still further object is to provide a crushing machine of improved performance and durability.

Further objects of the invention will appear from the following specification taken in connection with the accompanying drawings in which:

Figure 1 is a side view of the crushing machine with parts in section;

' Figure 2 is an end elevational view of the dis-' charge end of the crushing machine along lines 22 of Figure 1;

' Figure 3 is an end elevational view of the feed end of the crushin machine along lines 33 of Figure 1;

Figure 4 is a detailed sectional view of the feeding end bearing;

- Figure 5 is a detailed sectional view of the discharge end bearing;

Figure 6 is a longitudinal sectional view of a portion of the machine as taken along the line 66 of Figure 3;

Figure '7 is a cross-sectionalview as taken along the line 'I-lofFigure 6; a t

"Figure 8 is a fragmentary perspective view of the interconnected parts shown .in Figures 6 and 7;

Fig. 9 is a fragmentary sectional view of anotherembodiment; and

Fig. 10 is a cross sectional view along lines III-l-IIJ of Fig. 9. Y

Referring to Figs. 1 to 8 of the drawings, there is shown acrushing machine comprising a cylindrical drum I9 mounted betweentwo bearings l'-2,-.I13.. The bearings-I243 are-supported'by the stationary cross beams l4, I5 respectively. The drum is rotated in the bearings I 2, I3 by a pulley or gear I6. The material is fed to the rotating drum by a chute (not shown) centrally through the opening I9 of the flange or hub 49 of the feed annulus 25. It passes freely along the axis to the conical portion 39 of the annulus and is passedon and moved longitudinally through the drum I 0 by the deflector blades 29 or angular setting of lifting shelves as the material is picked up and dropped and broken up to pass through the apertures 2| of the drum. The larger unbroken pieces are 6 Claims. (01. 241-91) moved to the discharge end of the drum and may be discharged in any desired manner as by a plow and through an opening 38 in the discharge spider 26. a I

The drum l9 is mounted at the ends in the bearings I2, I3 by the feed annulus 25 and the oppo-' site spider 26 respectively. The annulus and spider are structurally connected by the longitudinal I- or H-beams 21. The annulus has an in wardly directed flange 28 with pads 22 for bolting to the ends of the beams 21. Similarly, the spider 26 has the flange 29 with pads 23 for the other ends of the beams 21. These flangesare in arcuate'formasillustrated in Fig. Band usu.-.: ally the ends of theI-beams atthe cooperating surfaces will be ground to fit the surfaces of the pads 22, 23 or an intervening spacer or shim 30 may be interposed between the I-beam and the flange as illustrated.

As illustrated in Figs. 1 to 8, the perforated cylinder32'of-the' drum is between the inner edges of flanges 28, 29 at its ends and the .beams 21- are. bolted to the pads 22, 23 on the flanges and en-' gage and support the-outer surface of the perforated cylinder strips 32, the bolts 34 passing through holes in the flange members penetrated.

This construction with the, annulus 25 provides a free feed opening I9 unobstructed by spokes of aspider or other supportingmeans, while the beams 27 rigidly brace the drum from end to end and securely support the load within the perforatedplates or cylinder 32 retained .by these beams against outward warping.

The pads 22, 23 of the flanges 28,29 are strong-"s: ly boundto the beams 21 and the cylinder partsby thebolts 34 so that the entire drum structure with its annulus 25 and spider 26 is self-support-: ing, these parts cooperating to rotatably carry. the load between the end bearings I2, I3.

Preferably the bearing I2 (Figs. 1 and 4) at the feed end is constructed to take radial and-axial thrust retaining thev drum in .place longitudinally. The..-o ther -bearingl3 (Fig.j5)-may be of any desired structure and is preferably radial permitting relative axial shifting of the parts.

The bearing structure I2 surrounds the hub 40 extending forward from the cone 39 of the annulus 25 and comprises a radial weight-supporting bearing 4|, and a combined radial and axial bearing 42 with dust seals 43, 44 at each end. The outer rin 45 is mounted on the cross beams I4 and rigidly secured thereto in any desired manner. The bearing l3 for the spider 26 is mounted in block 58 on cross beam I5 and comprises a ring 5| and cap bearing 52 with bushing 53, race bolted to the seat pads 33 as at 64 and with the cylinder plates 62 separately bolte d togthe inner bases 6| of the beams as indicated at 65."

construction maintains the strength and rigidity of the drum but with reduction in thevdiameter of the crushing chamber.

In both forms of the mill the material feed is central into the drum and there is no engagesv ment of material with spider arms and this avoids theeco tinuous en thru -pf he ibbQ f: co l or qtheri material; bein fed; and,.-I i 9: the '6- ultantwear onhe perts- 11? innerur ac s f the perforated cylinder are clear for; rolling treatmentbfgjtheparticles and; fragmentswith ly: chshelvi l bladins. etc-,7 as g e red r the-liftin and'p o esseoi he ma e al. sing-.intpandthrou h theem l. T e. f rm en oi the. entrances annulus with t eaxi l y ext n ng hubrlm' and flame? 2.8; and the intermedia ical portion 38 gives emery str n a dtif t cture for attachment, oi the: beam-e ds a 9 m..- binationexceptionall rig and most 'efjicientl-y anply gethe, metal to ttheicarry na of e oad: At-th s ame timethecrus i e c ionis effective and controllable the mat rial; andlms; 511 12:

mentrpositioned. withinthe d um inwany d sired arran ementadepending on theparti ulars material and the treatment involved;

n-aerushing millzoftheretery tyn h yin a; screening cylindenr and;,oir.cu1arheads at; the feed and at. th dischar endsois-said cylinder; afeed endhead; in;the;iorm.-.of an; annular. meme,

her having parallel: circular flanges at;-its.-.1inner peripherals surfaces of! said-: alignedt flanges; said. v

beams extendingiparalleltto the axis. ofua'nd. pro-, viding supportingmeans tor said cylinder;

2.; .Acrushing, mill; as.- set; forth in claim: 1 :in which: said, beams, are. adapted. to. be secured to either of theopposed.peripheralzsurfaces ofz each 4 of said aligned flanges, and in which said beams are adapted to provide supporting means for different diameter cylinders.

3. In a crushing mill of the rotary type having a screening cylinder and circular heads at the feed and at the discharge ends of said cylinder, a feed end head in the form of an annular member of hollow truncated conical shape having parallel circularfianges at its inneryand outer peripheral edges, said flanges being coaxial with said cylinder, the central opening of said member providing an unobstructed feeding aperture for said cylinderand the flange thereof defining said opening providing means for rotatably supporting the feed end of said cylinder, a discharge end head: in the form of a centrally bored spider havingpa circular peripheral flange extending from its outer peripheral edge in coaxial alignment with. the outer flange of said feed end head member, and circumferentially spaced beams extending; between; and securedtothe peripheral surevceeq s 11. l enedflanse l i b m x n g: parallelto the axis of; and providing supporting; eans i r eidr ylind r- 4. A crushing mill as set forth in claim 3 =in which said beams are-of; I -beam; shape and in which each :of; the opposed peripheral surfaces: of each of said aligned:flangesistadapted to havesecured thenetocorresponding horizontal flanges of said I-beams and inwhich said lebeams are adaptedto provide supporting means for: different diameter cylinders.

5. A crushing; mill as; set forth in, claim 3;;in which said beamsare of; I-beam shape: having; corresponding flanges adapted to be secured to; the-outerperipheral surfaces; of said aligned flanges and in which said cylinder is securedgto said horizontal flang esoi saidI-lcye i l gv said cylinder be n of 'a diameter sub a ia y e l othe outside diameters of said headsz 6 Acrushingmill as set forthv in; claim- 3 in which said beams. are-of. I-.beam shape having; corresponding flanges adapted to be securedz tothe innerperipheral surfacesof said aligned flanges and in which said cylinder is secured to the opposed horizontaliflanges of saidjeheams, said cylinder being of a diameter substantially less than the outside, diameters vofsaid heads.v

GEORGE W. BORTON.

REEERZENCESEICITEDZ The following references are-of record in the file of' this-patentz- UNITED STATES PATENTS Number: Name:- Date 150,217 Anderson Apr; 28;=18-'7v4; Lemma. Bortcnletar; Feats, 1914 1,563,173 Doerres Nov.24; 1925 1 ,9Q6,', ;1.;;. J IZtQ L M t -'2} 1 33 1351 1503; Hartshgrn;, Jan. 2;1934, 2 ,2,l; 58. 0 Kennedy Oct.22; 1940 2,355,050. Ber on; Aug 8, 19514: 

